Rabbeinu Yonah said that even the blink of an eye should be lesheim shamayim. In other words, all of our actions, should be lesheim shamayim. When you walk down the street and the world sees you, they should say, “Ah, there is a Ben Torah walking.”  Because you see, a Lomeid Torah is maybe only a few hours a day.  But a Ben Torah is 24 hours a day.  ~ Adapted from a shiur by R’ Noach Isaac Oelbaum Shlita